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Finding the Fourth Proportional to 100,396.56, 150,640.80 and 43,487.86

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Solution

The fourth proportional to 100,396.56, 150,640.80 and 43,487.86 is: 65,251.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,396.56 : 150,640.80 = 43,487.86 : x
  2. Step 2: Convert to fraction form
    100,396.56/150,640.80 = 43,487.86/x
  3. Step 3: Cross multiply
    100,396.56x = 150,640.80 × 43,487.86
  4. Step 4: Simplify right side
    100,396.56x = 6,551,045,481.01
  5. Step 5: Solve for x
    x = 6,551,045,481.01/100,396.56
  6. Step 6: Final answer
    x = 65,251.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.